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add policy cache for 'open'

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A fusepath -> basepath cache for `open` to limit the overhead of FUSE in 'open, read/write, close' patterns (such as Transmission).
This commit is contained in:
Antonio SJ Musumeci 2019-01-06 12:52:55 -05:00
parent 8e0aa1d9a6
commit 7a057daa0c
44 changed files with 858 additions and 649 deletions
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12
src/open.cpp
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@ -20,6 +20,7 @@
#include "fs_base_open.hpp"
#include "fs_cow.hpp"
#include "fs_path.hpp"
#include "policy_cache.hpp"
#include "rwlock.hpp"
#include "ugid.hpp"
@ -28,11 +29,8 @@
#include <string>
#include <vector>
#include <fcntl.h>
using std::string;
using std::vector;
using mergerfs::Policy;
namespace local
{
@ -64,6 +62,7 @@ namespace local
static
int
open(Policy::Func::Search searchFunc_,
PolicyCache &cache,
const Branches &branches_,
const uint64_t minfreespace_,
const char *fusepath_,
@ -72,13 +71,13 @@ namespace local
uint64_t *fh_)
{
int rv;
vector<const string*> basepaths;
string basepath;
rv = searchFunc_(branches_,fusepath_,minfreespace_,basepaths);
rv = cache(searchFunc_,branches_,fusepath_,minfreespace_,&basepath);
if(rv == -1)
return -errno;
return local::open_core(*basepaths[0],fusepath_,flags_,link_cow_,fh_);
return local::open_core(basepath,fusepath_,flags_,link_cow_,fh_);
}
}
@ -97,6 +96,7 @@ namespace mergerfs
ffi_->direct_io = config.direct_io;
return local::open(config.open,
config.open_cache,
config.branches,
config.minfreespace,
fusepath_,